I'll make a list of bugs that I've encountered so far. I'm playing voltz 2.01 on the Technic launcher. I'll update it if I encounter more bugs but the things I have so far:
1. Using universal cables attached to turbines made my client crash too after a few minutes. I don't think this is an isolated bug.
2. The crafting recipe for empty cells is broken, or it might have changed and I'm not seeing the new recipe. 4 tin in the empty cell recipe gives me tin plate instead of empty cells.